A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5998-00-971-2170
NSN 5950-01-396-2549
NSN 5999-00-236-8239
NSN 6645-01-428-1618
NSN 6105-00-171-6521
NSN 5950-01-245-1967
NSN 6145-00-753-2264
NSN 5975-01-315-7951
NSN 5835-00-918-8169
NSN 5945-00-900-7581
NSN 5965-00-768-4366
NSN 4140-01-567-0631